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Fundamental of Heterostructures - Coggle Diagram
Fundamental of Heterostructures
Heterostructures
A mixture of semiconductor material on different composition on single crystal
Compound semiconductor
Semiconductor alloy
Alloying : produce material with modified lattice constant, a
Binary alloy
Ternary alloy
Quartery / Hinger Order alloy
Elemental semiconductor
Vegard's Law & Heterostructures
An approximate empirical which describes lattice constant, a of an alloy if an average of lattice constant, a of pure compound weighted composition
Epitaxial Growth Technology
Heteroepitaxy
different element
different doping
Lattice matched
Homo
as = aL
Hetero : strained
aL < ac
as = ac
Homoepitaxy
same element
different doping
Lattice mismatched
unstrained
aL > ac
as != ac
lattice mismatch
critical thickness
Epitaxy
Growth of single crystal film on top of crystalline substrate
Homojunction
junction formed between
two
identical semiconductor materials
different doping concentration
example : diode, transistor
same energy bandgap
Heterojunction
junction formed between different materials
metal - semiconductor
metal - metal
semiconductor - semiconductor
different energy band gap and doping concentration
example : optoelectronics
